/*
 *  Copyright 2013 National Institute of Advanced Industrial Science and Technology
 *  
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.sss.server;

import java.util.HashMap;
import java.util.Map;
import java.util.UUID;

import org.sss.common.CommonStatus;
import org.sss.mapreduce.Configuration;
import org.sss.mapreduce.SssException;
import org.sss.mapreduce.StorageNode;

public abstract class TaskWithCounter extends Task implements CounterProvider {
  private Map<String, Long> counterMap = new HashMap<String, Long>();

  public TaskWithCounter(TaskSet taskSet,
              UUID jobID,
              SssServerResource resource,
              Configuration conf,
              StorageNode node,
              Input input) throws SssException {
    super(taskSet, jobID, resource, conf, node, input);
  }

  @Override
  public void updateCounter(String counterName, int diff) {
    synchronized (counterMap) {
      long val = 0L;
      if (counterMap.containsKey(counterName)) {
        val = counterMap.get(counterName);
      }
      val += diff;
      counterMap.put(counterName, val);
    }
  }

  @Override
  protected void setValueToStatus(CommonStatus s, Throwable e) {
    super.setValueToStatus(s, e);
    if (e == null) {
      synchronized (counterMap) {
        s.counter = new HashMap<String, Long>(counterMap);
      }
    }
  }
}
